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<h1>src/libsphinxbase/feat/cmn_prior.c</h1> </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */</span>
<a name="l00002"></a>00002 <span class="comment">/* ====================================================================</span>
<a name="l00003"></a>00003 <span class="comment"> * Copyright (c) 1999-2004 Carnegie Mellon University. All rights</span>
<a name="l00004"></a>00004 <span class="comment"> * reserved.</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> * Redistribution and use in source and binary forms, with or without</span>
<a name="l00007"></a>00007 <span class="comment"> * modification, are permitted provided that the following conditions</span>
<a name="l00008"></a>00008 <span class="comment"> * are met:</span>
<a name="l00009"></a>00009 <span class="comment"> *</span>
<a name="l00010"></a>00010 <span class="comment"> * 1. Redistributions of source code must retain the above copyright</span>
<a name="l00011"></a>00011 <span class="comment"> * notice, this list of conditions and the following disclaimer. </span>
<a name="l00012"></a>00012 <span class="comment"> *</span>
<a name="l00013"></a>00013 <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright</span>
<a name="l00014"></a>00014 <span class="comment"> * notice, this list of conditions and the following disclaimer in</span>
<a name="l00015"></a>00015 <span class="comment"> * the documentation and/or other materials provided with the</span>
<a name="l00016"></a>00016 <span class="comment"> * distribution.</span>
<a name="l00017"></a>00017 <span class="comment"> *</span>
<a name="l00018"></a>00018 <span class="comment"> * This work was supported in part by funding from the Defense Advanced </span>
<a name="l00019"></a>00019 <span class="comment"> * Research Projects Agency and the National Science Foundation of the </span>
<a name="l00020"></a>00020 <span class="comment"> * United States of America, and the CMU Sphinx Speech Consortium.</span>
<a name="l00021"></a>00021 <span class="comment"> *</span>
<a name="l00022"></a>00022 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND </span>
<a name="l00023"></a>00023 <span class="comment"> * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, </span>
<a name="l00024"></a>00024 <span class="comment"> * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR</span>
<a name="l00025"></a>00025 <span class="comment"> * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY</span>
<a name="l00026"></a>00026 <span class="comment"> * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span>
<a name="l00027"></a>00027 <span class="comment"> * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT </span>
<a name="l00028"></a>00028 <span class="comment"> * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, </span>
<a name="l00029"></a>00029 <span class="comment"> * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY </span>
<a name="l00030"></a>00030 <span class="comment"> * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT </span>
<a name="l00031"></a>00031 <span class="comment"> * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE </span>
<a name="l00032"></a>00032 <span class="comment"> * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00033"></a>00033 <span class="comment"> *</span>
<a name="l00034"></a>00034 <span class="comment"> * ====================================================================</span>
<a name="l00035"></a>00035 <span class="comment"> *</span>
<a name="l00036"></a>00036 <span class="comment"> */</span>
<a name="l00037"></a>00037 <span class="comment">/*************************************************</span>
<a name="l00038"></a>00038 <span class="comment"> * CMU ARPA Speech Project</span>
<a name="l00039"></a>00039 <span class="comment"> *</span>
<a name="l00040"></a>00040 <span class="comment"> * Copyright (c) 2000 Carnegie Mellon University.</span>
<a name="l00041"></a>00041 <span class="comment"> * ALL RIGHTS RESERVED.</span>
<a name="l00042"></a>00042 <span class="comment"> * **********************************************</span>
<a name="l00043"></a>00043 <span class="comment"> * </span>
<a name="l00044"></a>00044 <span class="comment"> * 30-Dec-2000 Rita Singh (rsingh@cs.cmu.edu) at Carnegie Mellon University</span>
<a name="l00045"></a>00045 <span class="comment"> * Created</span>
<a name="l00046"></a>00046 <span class="comment"> */</span>
<a name="l00047"></a>00047
<a name="l00048"></a>00048
<a name="l00049"></a>00049 <span class="preprocessor">#ifdef HAVE_CONFIG_H</span>
<a name="l00050"></a>00050 <span class="preprocessor"></span><span class="preprocessor">#include <config.h></span>
<a name="l00051"></a>00051 <span class="preprocessor">#endif</span>
<a name="l00052"></a>00052 <span class="preprocessor"></span>
<a name="l00053"></a>00053 <span class="preprocessor">#ifdef _MSC_VER</span>
<a name="l00054"></a>00054 <span class="preprocessor"></span><span class="preprocessor">#pragma warning (disable: 4244)</span>
<a name="l00055"></a>00055 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00056"></a>00056 <span class="preprocessor"></span>
<a name="l00057"></a>00057 <span class="preprocessor">#include "sphinxbase/ckd_alloc.h"</span>
<a name="l00058"></a>00058 <span class="preprocessor">#include "sphinxbase/err.h"</span>
<a name="l00059"></a>00059 <span class="preprocessor">#include "sphinxbase/cmn.h"</span>
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <span class="keywordtype">void</span>
<a name="l00062"></a><a class="code" href="cmn_8h.html#a0f6f70d51143d6a33130650b8d4758ab">00062</a> <a class="code" href="cmn_8h.html#a0f6f70d51143d6a33130650b8d4758ab" title="Set the prior mean.">cmn_prior_set</a>(<a class="code" href="structcmn__t.html" title="wrapper of operation of the cepstral mean normalization.">cmn_t</a> *cmn, mfcc_t <span class="keyword">const</span> * vec)
<a name="l00063"></a>00063 {
<a name="l00064"></a>00064 int32 i;
<a name="l00065"></a>00065
<a name="l00066"></a>00066 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"cmn_prior_set: from < "</span>);
<a name="l00067"></a>00067 <span class="keywordflow">for</span> (i = 0; i < cmn-><a class="code" href="structcmn__t.html#a10472e0ad9272f764b512ade43f37d69" title="Length of cepstral vector.">veclen</a>; i++)
<a name="l00068"></a>00068 <a class="code" href="err_8h.html#ae5a17ac5be8c738d3d977b1bea2d4538" title="Print logging information without header, to standard error stream.">E_INFOCONT</a>(<span class="stringliteral">"%5.2f "</span>, MFCC2FLOAT(cmn-><a class="code" href="structcmn__t.html#aef0faa6cd93f1d9cf12659c5980aefd2" title="Temporary variable: current means.">cmn_mean</a>[i]));
<a name="l00069"></a>00069 <a class="code" href="err_8h.html#ae5a17ac5be8c738d3d977b1bea2d4538" title="Print logging information without header, to standard error stream.">E_INFOCONT</a>(<span class="stringliteral">">\n"</span>);
<a name="l00070"></a>00070
<a name="l00071"></a>00071 <span class="keywordflow">for</span> (i = 0; i < cmn-><a class="code" href="structcmn__t.html#a10472e0ad9272f764b512ade43f37d69" title="Length of cepstral vector.">veclen</a>; i++) {
<a name="l00072"></a>00072 cmn-><a class="code" href="structcmn__t.html#aef0faa6cd93f1d9cf12659c5980aefd2" title="Temporary variable: current means.">cmn_mean</a>[i] = vec[i];
<a name="l00073"></a>00073 cmn-><a class="code" href="structcmn__t.html#adb70819b1ca822d5a4ee6dc94b3b48e7" title="The sum of the cmn frames.">sum</a>[i] = vec[i] * CMN_WIN;
<a name="l00074"></a>00074 }
<a name="l00075"></a>00075 cmn-><a class="code" href="structcmn__t.html#a456cc3313e93fa3057b658fef64a0c53" title="Number of frames.">nframe</a> = CMN_WIN;
<a name="l00076"></a>00076
<a name="l00077"></a>00077 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"cmn_prior_set: to < "</span>);
<a name="l00078"></a>00078 <span class="keywordflow">for</span> (i = 0; i < cmn-><a class="code" href="structcmn__t.html#a10472e0ad9272f764b512ade43f37d69" title="Length of cepstral vector.">veclen</a>; i++)
<a name="l00079"></a>00079 <a class="code" href="err_8h.html#ae5a17ac5be8c738d3d977b1bea2d4538" title="Print logging information without header, to standard error stream.">E_INFOCONT</a>(<span class="stringliteral">"%5.2f "</span>, MFCC2FLOAT(cmn-><a class="code" href="structcmn__t.html#aef0faa6cd93f1d9cf12659c5980aefd2" title="Temporary variable: current means.">cmn_mean</a>[i]));
<a name="l00080"></a>00080 <a class="code" href="err_8h.html#ae5a17ac5be8c738d3d977b1bea2d4538" title="Print logging information without header, to standard error stream.">E_INFOCONT</a>(<span class="stringliteral">">\n"</span>);
<a name="l00081"></a>00081 }
<a name="l00082"></a>00082
<a name="l00083"></a>00083 <span class="keywordtype">void</span>
<a name="l00084"></a><a class="code" href="cmn_8h.html#a4f624f5b805288f66fa05b79b1e4f383">00084</a> <a class="code" href="cmn_8h.html#a4f624f5b805288f66fa05b79b1e4f383" title="Get the prior mean.">cmn_prior_get</a>(<a class="code" href="structcmn__t.html" title="wrapper of operation of the cepstral mean normalization.">cmn_t</a> *cmn, mfcc_t * vec)
<a name="l00085"></a>00085 {
<a name="l00086"></a>00086 int32 i;
<a name="l00087"></a>00087
<a name="l00088"></a>00088 <span class="keywordflow">for</span> (i = 0; i < cmn-><a class="code" href="structcmn__t.html#a10472e0ad9272f764b512ade43f37d69" title="Length of cepstral vector.">veclen</a>; i++)
<a name="l00089"></a>00089 vec[i] = cmn-><a class="code" href="structcmn__t.html#aef0faa6cd93f1d9cf12659c5980aefd2" title="Temporary variable: current means.">cmn_mean</a>[i];
<a name="l00090"></a>00090
<a name="l00091"></a>00091 }
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00094"></a>00094 cmn_prior_shiftwin(<a class="code" href="structcmn__t.html" title="wrapper of operation of the cepstral mean normalization.">cmn_t</a> *cmn)
<a name="l00095"></a>00095 {
<a name="l00096"></a>00096 mfcc_t sf;
<a name="l00097"></a>00097 int32 i;
<a name="l00098"></a>00098
<a name="l00099"></a>00099 sf = FLOAT2MFCC(1.0) / cmn-><a class="code" href="structcmn__t.html#a456cc3313e93fa3057b658fef64a0c53" title="Number of frames.">nframe</a>;
<a name="l00100"></a>00100 <span class="keywordflow">for</span> (i = 0; i < cmn-><a class="code" href="structcmn__t.html#a10472e0ad9272f764b512ade43f37d69" title="Length of cepstral vector.">veclen</a>; i++)
<a name="l00101"></a>00101 cmn-><a class="code" href="structcmn__t.html#aef0faa6cd93f1d9cf12659c5980aefd2" title="Temporary variable: current means.">cmn_mean</a>[i] = cmn-><a class="code" href="structcmn__t.html#adb70819b1ca822d5a4ee6dc94b3b48e7" title="The sum of the cmn frames.">sum</a>[i] / cmn-><a class="code" href="structcmn__t.html#a456cc3313e93fa3057b658fef64a0c53" title="Number of frames.">nframe</a>; <span class="comment">/* sum[i] * sf */</span>
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <span class="comment">/* Make the accumulation decay exponentially */</span>
<a name="l00104"></a>00104 if (cmn-><a class="code" href="structcmn__t.html#a456cc3313e93fa3057b658fef64a0c53" title="Number of frames.">nframe</a> >= CMN_WIN_HWM) {
<a name="l00105"></a>00105 sf = CMN_WIN * sf;
<a name="l00106"></a>00106 <span class="keywordflow">for</span> (i = 0; i < cmn-><a class="code" href="structcmn__t.html#a10472e0ad9272f764b512ade43f37d69" title="Length of cepstral vector.">veclen</a>; i++)
<a name="l00107"></a>00107 cmn-><a class="code" href="structcmn__t.html#adb70819b1ca822d5a4ee6dc94b3b48e7" title="The sum of the cmn frames.">sum</a>[i] = MFCCMUL(cmn-><a class="code" href="structcmn__t.html#adb70819b1ca822d5a4ee6dc94b3b48e7" title="The sum of the cmn frames.">sum</a>[i], sf);
<a name="l00108"></a>00108 cmn-><a class="code" href="structcmn__t.html#a456cc3313e93fa3057b658fef64a0c53" title="Number of frames.">nframe</a> = CMN_WIN;
<a name="l00109"></a>00109 }
<a name="l00110"></a>00110 }
<a name="l00111"></a>00111
<a name="l00112"></a>00112 <span class="keywordtype">void</span>
<a name="l00113"></a><a class="code" href="cmn_8h.html#aae61df2ec71082520669fc63d94bb1ef">00113</a> <a class="code" href="cmn_8h.html#aae61df2ec71082520669fc63d94bb1ef" title="Update prior mean based on observed data.">cmn_prior_update</a>(<a class="code" href="structcmn__t.html" title="wrapper of operation of the cepstral mean normalization.">cmn_t</a> *cmn)
<a name="l00114"></a>00114 {
<a name="l00115"></a>00115 mfcc_t sf;
<a name="l00116"></a>00116 int32 i;
<a name="l00117"></a>00117
<a name="l00118"></a>00118 <span class="keywordflow">if</span> (cmn-><a class="code" href="structcmn__t.html#a456cc3313e93fa3057b658fef64a0c53" title="Number of frames.">nframe</a> <= 0)
<a name="l00119"></a>00119 <span class="keywordflow">return</span>;
<a name="l00120"></a>00120
<a name="l00121"></a>00121 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"cmn_prior_update: from < "</span>);
<a name="l00122"></a>00122 <span class="keywordflow">for</span> (i = 0; i < cmn-><a class="code" href="structcmn__t.html#a10472e0ad9272f764b512ade43f37d69" title="Length of cepstral vector.">veclen</a>; i++)
<a name="l00123"></a>00123 <a class="code" href="err_8h.html#ae5a17ac5be8c738d3d977b1bea2d4538" title="Print logging information without header, to standard error stream.">E_INFOCONT</a>(<span class="stringliteral">"%5.2f "</span>, MFCC2FLOAT(cmn-><a class="code" href="structcmn__t.html#aef0faa6cd93f1d9cf12659c5980aefd2" title="Temporary variable: current means.">cmn_mean</a>[i]));
<a name="l00124"></a>00124 <a class="code" href="err_8h.html#ae5a17ac5be8c738d3d977b1bea2d4538" title="Print logging information without header, to standard error stream.">E_INFOCONT</a>(<span class="stringliteral">">\n"</span>);
<a name="l00125"></a>00125
<a name="l00126"></a>00126 <span class="comment">/* Update mean buffer */</span>
<a name="l00127"></a>00127 sf = FLOAT2MFCC(1.0) / cmn-><a class="code" href="structcmn__t.html#a456cc3313e93fa3057b658fef64a0c53" title="Number of frames.">nframe</a>;
<a name="l00128"></a>00128 <span class="keywordflow">for</span> (i = 0; i < cmn-><a class="code" href="structcmn__t.html#a10472e0ad9272f764b512ade43f37d69" title="Length of cepstral vector.">veclen</a>; i++)
<a name="l00129"></a>00129 cmn-><a class="code" href="structcmn__t.html#aef0faa6cd93f1d9cf12659c5980aefd2" title="Temporary variable: current means.">cmn_mean</a>[i] = cmn-><a class="code" href="structcmn__t.html#adb70819b1ca822d5a4ee6dc94b3b48e7" title="The sum of the cmn frames.">sum</a>[i] / cmn-><a class="code" href="structcmn__t.html#a456cc3313e93fa3057b658fef64a0c53" title="Number of frames.">nframe</a>; <span class="comment">/* sum[i] * sf; */</span>
<a name="l00130"></a>00130
<a name="l00131"></a>00131 <span class="comment">/* Make the accumulation decay exponentially */</span>
<a name="l00132"></a>00132 if (cmn-><a class="code" href="structcmn__t.html#a456cc3313e93fa3057b658fef64a0c53" title="Number of frames.">nframe</a> > CMN_WIN_HWM) {
<a name="l00133"></a>00133 sf = CMN_WIN * sf;
<a name="l00134"></a>00134 <span class="keywordflow">for</span> (i = 0; i < cmn-><a class="code" href="structcmn__t.html#a10472e0ad9272f764b512ade43f37d69" title="Length of cepstral vector.">veclen</a>; i++)
<a name="l00135"></a>00135 cmn-><a class="code" href="structcmn__t.html#adb70819b1ca822d5a4ee6dc94b3b48e7" title="The sum of the cmn frames.">sum</a>[i] = MFCCMUL(cmn-><a class="code" href="structcmn__t.html#adb70819b1ca822d5a4ee6dc94b3b48e7" title="The sum of the cmn frames.">sum</a>[i], sf);
<a name="l00136"></a>00136 cmn-><a class="code" href="structcmn__t.html#a456cc3313e93fa3057b658fef64a0c53" title="Number of frames.">nframe</a> = CMN_WIN;
<a name="l00137"></a>00137 }
<a name="l00138"></a>00138
<a name="l00139"></a>00139 <a class="code" href="err_8h.html#ac3c705943d946708cea0a1443be1c853" title="Print logging information to standard error stream.">E_INFO</a>(<span class="stringliteral">"cmn_prior_update: to < "</span>);
<a name="l00140"></a>00140 <span class="keywordflow">for</span> (i = 0; i < cmn-><a class="code" href="structcmn__t.html#a10472e0ad9272f764b512ade43f37d69" title="Length of cepstral vector.">veclen</a>; i++)
<a name="l00141"></a>00141 <a class="code" href="err_8h.html#ae5a17ac5be8c738d3d977b1bea2d4538" title="Print logging information without header, to standard error stream.">E_INFOCONT</a>(<span class="stringliteral">"%5.2f "</span>, MFCC2FLOAT(cmn-><a class="code" href="structcmn__t.html#aef0faa6cd93f1d9cf12659c5980aefd2" title="Temporary variable: current means.">cmn_mean</a>[i]));
<a name="l00142"></a>00142 <a class="code" href="err_8h.html#ae5a17ac5be8c738d3d977b1bea2d4538" title="Print logging information without header, to standard error stream.">E_INFOCONT</a>(<span class="stringliteral">">\n"</span>);
<a name="l00143"></a>00143 }
<a name="l00144"></a>00144
<a name="l00145"></a>00145 <span class="keywordtype">void</span>
<a name="l00146"></a><a class="code" href="cmn_8h.html#aa622cf1b6a1b9a9bffd8f60b903bfc42">00146</a> <a class="code" href="cmn_8h.html#aa622cf1b6a1b9a9bffd8f60b903bfc42" title="CMN for one block of data, using prior mean.">cmn_prior</a>(<a class="code" href="structcmn__t.html" title="wrapper of operation of the cepstral mean normalization.">cmn_t</a> *cmn, mfcc_t **incep, int32 varnorm, int32 nfr)
<a name="l00147"></a>00147 {
<a name="l00148"></a>00148 int32 i, j;
<a name="l00149"></a>00149
<a name="l00150"></a>00150 <span class="keywordflow">if</span> (varnorm)
<a name="l00151"></a>00151 <a class="code" href="err_8h.html#a1a4495946ab2449d61108fe829a94613" title="Exit with non-zero status after error message.">E_FATAL</a>
<a name="l00152"></a>00152 (<span class="stringliteral">"Variance normalization not implemented in live mode decode\n"</span>);
<a name="l00153"></a>00153
<a name="l00154"></a>00154 <span class="keywordflow">if</span> (nfr <= 0)
<a name="l00155"></a>00155 <span class="keywordflow">return</span>;
<a name="l00156"></a>00156
<a name="l00157"></a>00157 <span class="keywordflow">for</span> (i = 0; i < nfr; i++) {
<a name="l00158"></a>00158 <span class="keywordflow">for</span> (j = 0; j < cmn-><a class="code" href="structcmn__t.html#a10472e0ad9272f764b512ade43f37d69" title="Length of cepstral vector.">veclen</a>; j++) {
<a name="l00159"></a>00159 cmn-><a class="code" href="structcmn__t.html#adb70819b1ca822d5a4ee6dc94b3b48e7" title="The sum of the cmn frames.">sum</a>[j] += incep[i][j];
<a name="l00160"></a>00160 incep[i][j] -= cmn-><a class="code" href="structcmn__t.html#aef0faa6cd93f1d9cf12659c5980aefd2" title="Temporary variable: current means.">cmn_mean</a>[j];
<a name="l00161"></a>00161 }
<a name="l00162"></a>00162 ++cmn-><a class="code" href="structcmn__t.html#a456cc3313e93fa3057b658fef64a0c53" title="Number of frames.">nframe</a>;
<a name="l00163"></a>00163 }
<a name="l00164"></a>00164
<a name="l00165"></a>00165 <span class="comment">/* Shift buffer down if we have more than CMN_WIN_HWM frames */</span>
<a name="l00166"></a>00166 <span class="keywordflow">if</span> (cmn-><a class="code" href="structcmn__t.html#a456cc3313e93fa3057b658fef64a0c53" title="Number of frames.">nframe</a> > CMN_WIN_HWM)
<a name="l00167"></a>00167 cmn_prior_shiftwin(cmn);
<a name="l00168"></a>00168 }
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